problem about porting kernel to mips`

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hi, all,
So sorry to distrub you. now, I am porting kernel to a board with vr4131 core. But when I run application, sometimes, kernel report bug in sched.c or traps.c. I debuged the kernel and found that problem is in_interrupt return 2(local_bh_irq is 2). So am I puzzled. And sometimes,kernel report data unaligned. Thanks very much for your help.

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